Hallux valgus sandal

ABSTRACT

A hallux valgus sandal ( 1 ) can include a sole element ( 10 ) having an outsole ( 12 ) and a footbed ( 14 ). The hallux valgus sandal ( 1 ) can also include a big-toe support( 40 ) for laterally supporting the big toe and a metatarsal belt ( 20 ), which circularly surrounds the metatarsal bones in interaction with the sole element ( 10 ) when the sandal ( 1 ) is worn and the length of which can be changed. A pressure cushion ( 30 ) is arranged on the inside of the sandal ( 1 ) in the area of the metatarsus in such a way that a laterally directed force can be applied to the inner metatarsal bone by applying the metatarsal belt ( 20 ) over the pressure cushion ( 30 ).

CROSS-REFERENCE TO RELATED APPLICATIONS

This is the U.S. National Stage of International Patent Application No.PCT/EP2013/058550, which has an international filing date of Apr. 24,2013, and claims priority benefit of German patent application no. 10201 2 206 739.6, filed Apr. 24, 2012. The entire contents of each of theforegoing are hereby incorporated herein by reference.

BACKGROUND

The disclosure relates to a hallux valgus sandal for the prevention andtreatment of malpositions in the metatarsal and forefoot region,particularly the malpositions of the big toe referred to as halluxvalgus.

Malpositions in the metatarsal and forefoot region, particularly apathological skew condition of the big toes that is referred to ashallux valgus, have a multitude of causes. On the one hand, suchmalformations are inborn or hereditary; on the other hand, suchmalpositions are brought about by wearing incorrect footwear or theflattening of the longitudinal and transverse arch as a result ofinstability in the metatarsal region, particularly due to an instabilityof the connective tissue. As a result of the flattening of thetransverse arch, which is also referred to as splayfoot, the individualmetatarsal and toe bones are fanned out radially. The metatarsal bone ofthe first ray, i.e., the inner or medial metatarsal bone is abductedinward. As a result, the tendons of the big toe, which, unlike the othertoes, has an independent tendon apparatus, no longer run centrally overthe first metatarsophalangeal joint but, due to their predefined length,laterally outside of it. The big toe is thus pulled into an oblique,outwardly oriented position. What is more, the formation of halluxvalgus is also amplified by the subsidence of the longitudinal arch,because this predominantly medial subsidence results anatomically in arotation of the metatarsus and forefoot outward when seen from above.

As is common in anatomy, a reference system is used in the descriptionthat is centered on the midline of the body to indicate position anddirection. Accordingly, “interior” or “lying on the inside” or “medial”always refer to the midline and opposite the respective other foot.Therefore, “in the medial direction” also means in the direction of therespective other foot. “Exterior” or “lateral” refer to the side facingaway from the midline of the body, so that the lateral direction pointsaway from the midline and hence from the respective other foot.

A metatarsal bone and the associated toe bones arranged anterior theretoare also referred to as “rays.” The interior metatarsal bone and theinterior toe bones arranged anterior thereto are regarded as the firstray. The individual rays are numbered serially and increase in thelateral direction, so that the exterior metatarsal bone and theassociated toe bones arranged anterior thereto form the fifth ray.

Various sandals for the correction and/or prevention of hallux valgusdiseases are known from the prior art. In particular, a sandal is knownfrom German utility model DE 20 2008 008 106 that is preferably embodiedas a flip-flop sandal. The flip-flop sandal has a shoe sole as well as abig toe receiving compartment for discretely receiving the big toeseparately from the other toes. Furthermore, the known sandal comprisesa metatarsal bandage for supporting the metatarsus that has lateralsegments supporting the sole of the foot that are pulled inward by theside flanks of the shoe upper toward the mid-sole. The metatarsalbandage is centered via a centering device on the shoe sole. This priorart is considered in the preamble of claim 1.

As a result of the metatarsal bandage of the flip-flop sandal,corrective forces are emitted in an undefined manner in the radialdirection onto the metatarsal region over the entire girth of thebandage. During use, substantially uniform pressure is applied from allsides onto the metatarsal region, so that the metatarsal bones are alsopressed together in an undefined manner. Moreover, the alignment of themetatarsal region in relation to the shoe sole and to the big toe is notclearly defined, particularly upon lifting of the lateral edges of thesole of the foot. A shifting or rotation of the longitudinal axis of thefoot to the longitudinal axis of the sandal can occur in the metatarsalregion.

General Description

In view of this prior art, it is the object of the present disclosure toprovide a sandal in which the metatarsal region is flawlessly alignedwith the toe bone of the first ray even during the walking motion and inwhich a defined corrective force for the prevention and/or treatment ofmalpositions is applied gently to the foot.

The hallux valgus sandal according to the disclosure comprises a soleelement with an outsole and a footbed. The hallux valgus sandal furthercomprises a big-toe support for laterally supporting the big toe. Duringwearing of the sandal, a metatarsal belt circularly surrounds the sandalwearer's metatarsal bones in interaction with the sole element. Thelength of the metatarsal belt can be adjusted. In the metatarsal regionon the inside of the sandal, a pressure cushion is arranged such that,when the metatarsal belt is applied over the pressure cushion, alaterally directed force can be exerted on the inner metatarsal bone.The pressure cushion is particularly arranged on the interior of themetatarsal belt in the medial region of the sandal. As a result, thepressure cushion is located between the metatarsal belt and themetatarsal bone of the first ray when the sandal is worn.

The sandal according to the disclosure is subdivided substantially intothree regions in the longitudinal direction. The division into regionsis based on the foot of the wearer of the sandal. However, in order toprovide an approximation of the regions, only average values for therespective length of the region based on a standard foot can be used forthe respective foot length and shoe size. The tarsal bones, which definethe ankle or hindfoot region of the sandal and of the sole element, arelocated in the rear region. Starting in the heel region, the ankleregion includes the heel bone followed by the anklebone laterallyslightly forward. The cuboid bone and the navicular bone are located infront of that in the direction of the toes. Another three sphenoid bonesare located to the side of the cuboid bone and in front of the navicularbone. The metatarsal bones, also referred to as the ossa metatarsalia,are adjacent to the anklebones in the longitudinal direction in front ofthose and define the midfoot region or metatarsus. The medial metatarsalbones tend to be pushed somewhat forward toward the tip of the foot incomparison to the lateral metatarsal bones. As a result, the boundariesof the metatarsal region are shifted from the inside of the foot to theoutside of the foot rearward in the longitudinal direction of the foot.The toe or forefoot region, which is defined by the two toe bones of thebig toe and the three respective toe bones of the second, third, fourthand small toe, is arranged in front of the metatarsal region. Thesethree regions each correspond approximately to a third of the overallfoot length.

According to the disclosure, the pressure cushion has an effectivelength that is aligned substantially in the longitudinal direction ofthe foot. In the applied state, an active surface of the pressurecushion is brought into contact with the foot via this effective length.Preferably, the length of the metatarsal belt is changed or shortenedfor the application of the pressure cushion. As a rule, the length isshortened until the shoe, particularly the metatarsal belt and thefootbed, rests substantially against the metatarsus, surrounds it andthe desired corrective force is achieved. Upon application, the pressurecushion and/or the metatarsal belt can particularly deform elasticallydepending on the material. The effective length of the pressure cushionpreferably corresponds to the metatarsal region of the sandal, so thatthe pressure cushion rests against the metatarsal bone over the entirelength of the metatarsal bone. In this way, a corrective force isapplied in the lateral direction to the metatarsal bone over its entirelength. As a rule, it must be ensured that the corrective force is notapplied directly to bones, particularly to the bones of the firstmetatarsophalangeal joint, but rather is introduced indirectly via thesoft tissues of the first metatarsal bone. This preventspressure-related discomforts and damage to tissues. The corrective forceis thus applied in the anterior region of the pressure cushion,particularly behind the first metatarsophalangeal joint medially ontothe soft tissue of the metatarsal bone and extends rearward over theentire length of the metatarsal bone. The width of the metatarsal belton its interior preferably also extends over the effective length of thepressure cushion. As a result, the force that is introduced by themetatarsal belt into the pressure cushion is introduced uniformly.

The pressure cushion is a three-dimensional element that is preferablyarranged between the metatarsal belt and the foot of the wearer of thesandal. The thickness of the pressure cushion, i.e., its extension fromthe metatarsal belt in the direction of the foot, can vary depending onthe application, treatment or the like. The pressure cushion can beattached to the metatarsal belt and/or the sole element so that itsposition and orientation are clearly defined. Through the structuring ofthe three-dimensional shape of the pressure cushion, the introduction offorce and distribution of pressure on the medial metatarsal bone can beset and adjusted. The pressure cushion is preferably integrated inflowing shapes into the metatarsal belt without producing a sharp edge.Preferably, the pressure cushion has a greater thickness in the frontregion than in the rear region. Its shape can be wedge-shaped, convex orthe like. For example, the pressure cushion can be convex and thus beadapted to the foot arch. Abrupt changes in shape and resulting jumps inpressure are to be avoided. Accordingly, the various regions of thepressure cushion should form a contour with flowing transitions so thatthe changes in compressive force occur continuously, especially at theends of the pressure cushion. Through the cooperation of the pressurecushion with the change in the length of the metatarsal belt, thecorrective force to be applied to the metatarsal bone can be adjusted ina targeted manner in its amount and/or direction. The treatment ofhallux valgus ailments is thus improved.

The width of the metatarsal belt preferably decreases from the insidetoward the outside. The metatarsal belt thus has its maximum width inthe region of the pressure cushion. This improves the introduction ofpressure into the pressure cushion. Toward the outside, the metatarsalbelt becomes narrower. It can also transition into a raised sole edge ofthe sandal. A commensurately raised sole edge can also be embodied inthe region of the pressure cushion on the inner side of the sandal. Tooptimize the weight and the material cost as well as to achieve goodventilation of the foot, the sandal has a trapezoidal or triangularreceptacle in the metatarsal belt. The receptacle preferably has itsgreatest dimensions on the inside adjacent to the pressure cushion andbecomes narrower toward the outside. Sharp edges must be avoided in themetatarsal belt and receptacle in order to reduce load peaks that arebrought about by forces upon application of the metatarsal belt.

As stated, when viewed from above, the metatarsal region runs from theinside to the outside obliquely rearward. Preferably, the middle of themetatarsal belt runs substantially parallel to the boundaries of themetatarsal region. Accordingly, the middle also runs rearward from theinside of the foot to the outside of the foot. The midpoint between thefront and rear end of the belt is regarded here as being the middle ofthe metatarsal belt on which the middle connecting points of themetatarsal belt are located, so that the middle correspondsapproximately to the gravity center line in the longitudinal directionof the metatarsal belt. As a result of the oblique course of the middleof the metatarsal belt, the middle connecting point on the inside of thesandal is shifted further forward than the middle connecting point onthe outside of the sandal.

The length of the metatarsal belt can preferably be changed by means ofa hook-and-pile fastener. By shortening the length of the metatarsalbelt, the metatarsal belt is tensioned, thus introducing a tensile forcein the metatarsal belt in the applied state of the sandal. Thiscorrective force is applied via the metatarsal belt and the pressurecushion in targeted manner to the metatarsal bone of the first ray.Alternatively, tensioning means such as elastic elements or tractionbelts with an appropriate closure such as a clasp, for example, can beused. Preferably, the hook-and-pile fastener is arranged on the outsideof the sandal or of the metatarsal belt. Preferably, a first end of ahook-and-pile strap is worked into the sole element. Another element ofthe hook-and-pile fastener, a receptacle for the hook-and-pile strap, isarranged on the outside of the sandal, particularly on a raised soleedge. The free, second end of the hook-and-pile strap can be fastened invarious positions on the receptacle, thus enabling a loop of variablelength to be formed above it and rendering the length of the metatarsalbelt adjustable. Alternatively, the metatarsal belt is embodied as amedial and a lateral metatarsal belt element, and the length is adjustedvia the amount of overlapping. The two elements can be connected to eachother with variable overlapping in various positions by means of snapfasteners or a hook-and-pile fastener.

Preferably, the big-toe support is embodied as a big-toe loop. Thebig-toe loop surrounds the big toe in the applied state of the sandal inan at least partially circular manner. Preferably, the big-toe loop isU-shaped and connected to the sole element in two places. The big-toesupport can preferably be adjusted, particularly in relation to itsposition and/or length. As a result, the supporting effect on the bigtoe is adjusted. The length can be adjusted, for example, by means of ahook-and-pile fastener. Different designs can be embodied analogously tothe adjusting mechanism of the metatarsal belt. Alternatively, thebig-toe support can also be embodied as a land against which the big toerests.

The footbed of the hallux valgus sandal is preferably embodied as anorthopedic footbed. An orthopedic footbed has, in particular, alongitudinal and/or transverse arch as well as receptacles ordepressions for the toes. The footbed can also comprise one or morepelottes. A pelotte is generally a raised area of the footbed formedical purposes. More preferably, at least one pelotte is aproprioceptive pelotte and embodied according to Golgi's teaching, sothat the pelotte exerts pressure on the foot such that it serves toregulate the muscle tone. The muscles are to be influenced such that atreatment of the hallux valgus is supported.

More preferably, the sole element has on its underside, i.e., in theregion of the outsole, rolling slits transverse to the sole. The rollingslits are frequently arranged such that they support a natural rollingmotion. For this purpose, the slits are arranged beneath the naturalrolling axis of the toes. The rolling slits preferably run parallel tothe natural rolling axis. There is at least one rolling slit, althoughthere are generally several rolling slits in the sole that are arrangedin the longitudinal direction one in front of the other and parallel toeach other.

The hallux valgus sandal according to the disclosure can be manufacturedfrom different known materials that are common in the prior art in themanufacture of sandals, such as plastic, cork, leather, and the like.Preferably, the outsole, big-toe support and parts of the metatarsalbelt are embodied integrally of plastic. The one-piece design can beachieved, for example, through baking of plastic granulate or injectionmolding or foaming of plastic. Particularly, a material similar to thatof Crocs sandals can be used. Such a material has a certain inherentelasticity. Preferably, all of the parts of the metatarsal belt with theexception of the adjusting mechanism, e.g., the hook-and-pile fastener,are manufactured integrally from plastic. During manufacture, theadjusting mechanism can be embodied as an insert and is connected firmlyto the plastic during the manufacturing process. In such an embodiment,the footbed and/or the pressure cushion can be embodied as separateparts and are therefore exchangeable. In particular, the footbed isembodied separately. The footbed is inserted into a receptacle in theoutsole and held frictionally in its position. The footbed can thus beadapted to the wearer and, moreover, it can be manufactured from adifferent material or from a different material mixture than theoutsole. Preferably, the sole is slitted from the front end in theregion between the first and second toes, so that the big-toe support orthe big-toe loop can be embodied integrally with the outsole and guidedthrough the footbed. This offers advantages to the effect that theelements can be adapted to the individual shape and to the needs of thewearer of the sandal. For instance, the strength of the corrective forcecan thus be adapted to the severity of the hallux valgus malposition bythe size and shape of the pressure cushion. Furthermore, individualpeculiarities of the foot can be taken into account by a commensuratefootbed.

Alternatively, the pressure cushion and/or the footbed is embodiedintegrally with the outsole, the big-toe support and parts of themetatarsal belt. In such an embodiment as well, additional parts of thesandal can be worked in during the manufacturing process, for example asinserts. An effective, robust and cost-effective sandal for thetreatment of hallux valgus malpositions can thus be manufactured.

Through the hallux valgus sandal according to the disclosure, theprevention and/or treatment of hallux valgus malpositions is improved.The treatment is administered according to the principle of “from backto front.” What is meant by this is that a treatment of the malpositiondoes not begin merely in the toe region, but rather in the metatarsus,that is, “from the back” and continues “forward” into the toe region. Byvirtue of the pressure cushion, the corrective force on the metatarsalbone can be adjusted in a targeted and gentle manner. Through the use ofan exchangeable and/or individually adaptable pressure cushion, theintroduction of the corrective force into the respective foot can befurther improved. The adjustment of the corrective force is particularlyachieved by changing the length of the metatarsal belt. As a result, atensile force is built up via the metatarsal belt that is transferredvia the pressure cushion in a targeted manner, i.e., defined in strengthand direction, to the metatarsal bone. This corrective force actsagainst the big-toe support and has the effect that the big toe does notdrift with the metatarsal bone in the lateral direction but rather isstraightened along the axis of the first ray. This treatment counteractsthe spreading of the metatarsal bone, and a medial supportive force isapplied to the big toe via the big-toe support. This results ineffective treatment and prevention of hallux valgus disorders.

BRIEF DDESCRIPTION OF THE DRAWINGS

The disclosure is explained in further detail below on the basis of apreferred exemplary embodiment that is shown in the figures. Therebyshowing:

FIG. 1 a top view of a sandal according to the disclosure;

FIG. 2 a top view of the sandal while being worn;

FIG. 3 a pressure cushion according to the disclosure on a footskeleton;

FIG. 4 a front view of a sandal according to the disclosure;

FIG. 5 a view from below of the sandal according to the disclosure; and

FIG. 6 a three-dimensional representation of a sandal according to thedisclosure.

DETAILED DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a hallux valgus sandal 1 according to the disclosure. Thesandal 1 comprises a sole element 10 with an outsole 12 (cf. FIG. 6) anda footbed 14. The sandal 1 and the footbed 14 are subdivided intosubstantially three regions, namely an ankle region 52, a metatarsalregion 54 and a toe region 56, which correspond to the regions of thehuman foot. FIG. 2 shows how a foot or foot skeleton 50 is received bythe sandal 1 when the sandal 1 is worn. The anklebones 52 a are arrangedin the rear region of the foot skeleton 50 (cf. FIG. 3). Metatarsalbones 54 a are arranged in the longitudinal direction in front of thoseand, in turn, the toe bones 56 a are arranged in front of those.Analogously to the foot, the footbed 14 or the sandal 1 also has thesethree regions 52, 54, 56 that are defined by the corresponding bones.The regions each correspond to approximately a third of the length ofthe entire foot, although the respective absolute length is also basedon the shoe size and length of the foot. However, deviations from thiscan arise as a result of the individual structures in the foot of therespective wearer.

The sandal 1 also has a metatarsal belt 20. The metatarsal belt 20 isarranged substantially in the metatarsal region 54 of the sandal 1. Themetatarsal belt 20 is embodied integrally with the sole element 10 onthe inside of the sandal. Laterally, the metatarsal belt 20 has ahook-and-pile strap 22. The hook-and-pile strap 22 is embedded in thesole element 10 medially to the sole outer edge and leads out of it.When the sandal is being worn, the hook-and-pile fastener on the soleelement 10 is located beneath the lateral region of the metatarsus. Thehook-and-pile strap is guided through an opening as a redirection 26 inthe metatarsal belt 20 and can be fastened via a hook-and-pile strapreceptacle 24 on the outside of the sole element of the sandal 1. A loopis thus formed by the hook-and-pile strap 22 by means of which thelength of the metatarsal belt 20 can be altered in a flexibly adjustablemanner.

As its name suggests, the metatarsal belt 20 is arranged in themetatarsal region of the sandal 1 and, when the sandal 1 is being worn,surrounds the foot circularly in the metatarsal region 54 in conjunctionwith the sole element 10 and the footbed 14. The metatarsal bones 54 acan thus be tensioned together by reducing the length of the metatarsalbelt 20.

The width of the metatarsal belt 20 corresponds at the inside of thesandal 1 to about the length of the metatarsal region 54 of the sandal1. The width of the metatarsal belt 20 decreases in the lateraldirection. In addition, the metatarsal belt 20 is shifted rearward atits lateral end in the longitudinal direction of the foot in relation toits medial end. The metatarsal belt 20 thus runs substantially parallelto the metatarsal region 54 of the foot and of the sandal 1. Themetatarsal belt 20 is embodied with a receptacle 28 having a trapezoidalshape. The force effect is thus optimized with minimal weight andminimal material cost.

A pressure cushion 30 is arranged on the inside of the sandal 1 in theregion of the metatarsal belt 20. The pressure cushion 30 is embodiedintegrally with the inside of the metatarsal belt 20 and of the footbed14. The pressure cushion 30 rests against the inside of the foot overthe effective length L. As shown in the top view in FIG. 3, the pressurecushion 30 is substantially wedge-shaped and has a greater thickness inthe lateral direction in the front region than in the rear region. Whenthe sandal 1 is worn, the pressure cushion 30 is located between themetatarsal belt 20 and the inner metatarsal bone 54 a, i.e., themetatarsal bone 54 a of the first ray. By tensioning the metatarsal belt20 by means of the hook-and-pile strap 22, a corrective force Fk isexerted via the pressure cushion 30 on the metatarsal bone 54 a of thefirst ray. The corrective force Fk acts substantially in the lateraldirection. Through the application of the corrective force Fk, thespreading, i.e., the malpositioning of the anklebone 52 a, particularlyof the metatarsal bone 54 a of the first ray and hence the hallux valgusas well, is counteracted. By virtue of the wedge-shaped design of thepressure cushion 30, the corrective force Fk is higher in the frontregion of the metatarsus 54 than in the rear region. The front forceattack point is placed in the region of the soft tissues behind thefirst metatarsophalangeal joint. The pressure cushion 30 or theeffective length L is embodied substantially over the entire length ofthe metatarsal region 54 of the sandal 1 and of the metatarsal bone 54 aof the first ray.

The big toe is supported laterally by a big-toe support 40 that isembodied as a big-toe loop 42. The loop 42 is substantiallysemicircular, as shown in FIG. 4, and surrounds the big toe circularlyin conjunction with the footbed 14. The big-toe loop 42 thus counteractsa lateral movement of the big toe, which is particularly also achievedthrough application of a lateral corrective force Fk on the metatarsalbone 54 a of the first ray via the pressure cushion 30. The correctiveforce Fk can thus be applied to the metatarsal bone 54 a of the firstray and an opposing force Fw can be applied to the toe bones 56 a of thefirst ray in order to counteract and correct a hallux valgusmalposition. The corrective force Fk can be adjusted by the wearerthemselves via the length of the metatarsal belt 20 or via the length ofthe hook-and-pile strap 22.

As shown in FIG. 1 and FIG. 6, the footbed 14 is anatomically shaped andhas several palottes 16, i.e., raised areas in the region of themetatarsus and hindfoot. A retrocapital and a hallux pelotte 16 a, 16 bare arranged here according to Golgi's teaching in order to influencethe plexus for regulating muscle tone. The retrocapital pelotte 16 a isarranged over the entire width in the metatarsal region and exerts apressure on the tendons of the toes running beneath the foot skeleton.The pressure on the tendons leads to a relaxation of the toe flexormusculature. This relaxing effect is amplified in the medial region ofthe metatarsus by a hallux pelotte 16 b, which is arranged above theretrocapital pelotte, so that the raised area is raised further herefrom the footbed. During wearing, the hallux pelotte 16 b exertsadditional pressure on the tendon of the big toe lying beneath theskeleton. Furthermore, a valgus pelotte 16 c is arranged in the medialregion of the footbed 14 in the longitudinal direction behind the halluxpelotte 16 b. Due to its position in the medial hindfoot region, thevalgus pelotte 16 c has an activating effect on the longitudinal archmusculature. As a result, the longitudinal arch is raised.

As shown in FIG. 5, outsole 12 has rolling slits 18 on its underside inthe transverse direction. The rolling slits 18 are shifted downwardparallel to a natural rolling axis of the foot.

The sandal 1 is made in a substantially integral manner of plastic. Onlythe hook-and-pile strap 22 is worked in as an insert through the firmconnection of an end of the hook-and-pile strap 22 to the sole element10. In addition, the sandal 1 has a receptacle 24 for the hook-and-pilestrap 22 on its underside that is also firmly connected to the sandal 1as an insert. The hook-and-pile strap receptacle 24 is embodied as afelt strap with hooks and the hook-and-pile strap 22 as a fleece strap.

1-16. (canceled)
 17. A hallux valgus sandal (1), having: a sole element(10) with an outsole (12) and a footbed (14), a big-toe support (40) forlaterally supporting the big toe, a metatarsal belt (20) which, when thesandal (1) is being worn, circularly surrounds the metatarsal bones incooperation with the sole element (10) and can be changed in length, anda pressure cushion (30) with an effective length (L) being arranged onthe inside of the sandal (1) in the region of the metatarsus such that,through application of the metatarsal belt (20) over the pressurecushion (30), a laterally directed corrective force can be exerted onthe inner metatarsal bone that can be adjusted by changing the length ofthe metatarsal belt, and the front force attack point is placed in theregion of the soft tissues behind the first metatarsophalangeal joint.18. The hallux valgus sandal (1) as set forth in claim 17, wherein aneffective length of the pressure cushion (30) running in thelongitudinal direction of the sandal (1) corresponds to the length of amedial metatarsal region (54) of the sandal (1).
 19. The hallux valgussandal (1) as set forth in claim 18, wherein the width of the metatarsalbelt (20) on the inside of the sandal (1) corresponds substantially tothe effective length of the pressure cushion (30).
 20. The hallux valgussandal (1) as set forth in claim 17, wherein the metatarsal belt (20)has a decreasing width in the lateral direction.
 21. The hallux valgussandal (1) as set forth in claim 20, wherein the metatarsal belt has atrapezoidal or triangular receptacle (28).
 22. The hallux valgus sandal(1) as set forth in claim 17, wherein a middle connecting point of themetatarsal belt (20) to the sole element (10) on the inside of thesandal (1) is arranged in the longitudinal direction of the sandal (1)in front of a middle connecting point on the outside of the sandal (1).23. The hallux valgus sandal (1) as set forth in claim 17, wherein thebig-toe support (40) is embodied as a big-toe loop (42) that surroundsthe big toe at least in part when the sandal (1) is worn.
 24. The halluxvalgus sandal (1) as set forth in claim 23, wherein the length of thebig-toe loop (42) can be adjusted.
 25. The hallux valgus sandal (1) asset forth in claim 17, wherein the metatarsal belt (20) and/or thebig-toe loop (42) has a hook-and-pile fastener (22, 24) for adjustingthe length.
 26. The hallux valgus sandal (1) as set forth in claim 25,wherein a receptacle (24) for the hook-and-pile strap (24) of themetatarsal belt (20) is arranged on the outside of the sandal (1). 27.The hallux valgus sandal (1) as set forth in claim 17, wherein thefootbed (14) is an orthopedic footbed.
 28. The hallux valgus sandal (1)as set forth in claim 17, wherein the footbed (14) has at least onepelotte (16).
 29. The hallux vlagus sandal (1) as set forth in claim 17,wherein the footbed (14) has at least one proprioceptive pelotte (16 a,16 b, 16 c).
 30. The hallux valgus sandal (1) as set forth in claim 17,wherein the outsole (12) has at least one rolling slit (18) arranged inthe transverse direction with respect to the sandal (1).
 31. The halluxvalgus sandal (1) as set forth in claim 17, wherein the outsole (12),the big-toe support (40) and parts of the metatarsal belt (20) areembodied integrally of plastic.
 32. The hallux valgus sandal (1) as setforth in claim 31, wherein the pressure cushion (30) and/or the footbed(14) are embodied integrally with the outsole (12), the big-toe support(40) and parts of the metatarsal belt (20).
 33. Hallux valgus sandal (1)as set forth in claim 17, wherein the footbed (14) and/or the pressurecushion (30) are embodied as exchangeable parts and are exchangeable.